I run all of my games from the original disc, I don't have (or know how to get) PS2 ISO's.
I'm not sure if there's any errors... Here's the output window when I start up PCSX2 and try to run SO3. I closed it before I took the screenshot, so that's why it has all of that at the bottom.
I believe it has my PC specs up top, too. (Sorry, I'm very non-computer savvy)[Image: 12555rn.jpg]